The backlog of unanalyzed sexual assault forensic exam evidence is often referred to as a DNA backlog or “sexual assault kit backlog” or “rape kit backlog”. Backlog occurs when SAKs are collected but DNA analysis is not requested (unsubmitted SAKs). Backlog also occurs when SAKS are submitted to crime labs, but not tested in a timely manner (untested SAKs).
What is a Sexual Assault Kit or Rape Kit?
A rape kit is a package of materials used to collect samples (evidence) from the victim's or suspect's body by a medical professional, often a medical-forensic examiner, such as a Sexual Assault Nurse Examiner (SANE). The type of evidence collected depends on what occurred during the assault. The contents of a rape kit vary by jurisdiction, but generally include swabs and collection envelopes for biological materials, debris, and underwear.
Source: National Best Practices for Sexual Assault Kits: A Multidisciplinary Approach